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Get scalar value from table
Using the new OMS Log Analytics query language, how do I get a scalar value out of a table? That is, what is the equivalent of this TSQL query, presuming Table1 has a single row: Select @ScalarVar ...
Tim,
You're looking for toscalar(). For a slightly more advanced example of how to use it (together with makeset() and in()), check out the last section of our aggregations tutorial.
To pseudocode your example, you'd be looking at something like:
let myDateTime = toscalar(Table1 | summarize max(TimeGenerated));
Table 2
| where TimeGenerated between ((myDateTime - 5m) .. (myDateTime + 5m))
| ...
Evgeny,
Perfect. Thanks. I knew there was something like that in there somewhere, but I was having trouble finding it in the language reference. I see it now under Scalar Functions.
Great example by Evgeny For some small things you do not even need scalar like: let WinComps = Heartbeat | where OSType == 'Windows' | distinct Computer; Perf | where Computer in (WinComps) | limit 10